Question

Find the sum of -52 and -87.​

Answer 1

Answer: -139

Step-by-step explanation:

To find the sum of an arithmetic sequence, start by identifying the first and last number in the sequence. Then, add those numbers together and divide the sum by 2. Finally, multiply that number by the total number of terms in the sequence to find the sum.

Answer 2

Answer: -139

Step-by-step explanation: -139 has became -139  because (-)+(-) becomes one (+)so we have added both numbers (52 + 87= 139), but we have to put sign of bigger one number which are -52 and -87.